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drm/radeon/kms: Schedule host path read cache flush through the ring V2

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R300 family will hard lockup if host path read cache flush is
done through MMIO to HOST_PATH_CNTL. But scheduling same flush
through ring seems harmless. This patch remove the hdp_flush
callback and add a flush after each fence emission which means
a flush after each IB schedule. Thus we should have same behavior
without the hard lockup.

Tested on R100,R200,R300,R400,R500,R600,R700 family.

V2: Adjust fence counts in r600_blit_prepare_copy()

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jerome Glisse
2010-01-07 12:39:21 +01:00
committed by Dave Airlie
parent 62cdc0c206
commit cafe6609d6
13 changed files with 33 additions and 32 deletions
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7
drivers/gpu/drm/radeon/r600.c
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@@ -1388,11 +1388,6 @@ void r600_pciep_wreg(struct radeon_device *rdev, u32 reg, u32 v)
(void)RREG32(PCIE_PORT_DATA);
}
void r600_hdp_flush(struct radeon_device *rdev)
{
WREG32(R_005480_HDP_MEM_COHERENCY_FLUSH_CNTL, 0x1);
}
/*
* CP & Ring
*/
@@ -1789,6 +1784,8 @@ void r600_fence_ring_emit(struct radeon_device *rdev,
radeon_ring_write(rdev, PACKET3(PACKET3_SET_CONFIG_REG, 1));
radeon_ring_write(rdev, ((rdev->fence_drv.scratch_reg - PACKET3_SET_CONFIG_REG_OFFSET) >> 2));
radeon_ring_write(rdev, fence->seq);
radeon_ring_write(rdev, PACKET0(R_005480_HDP_MEM_COHERENCY_FLUSH_CNTL, 0));
radeon_ring_write(rdev, 1);
/* CP_INTERRUPT packet 3 no longer exists, use packet 0 */
radeon_ring_write(rdev, PACKET0(CP_INT_STATUS, 0));
radeon_ring_write(rdev, RB_INT_STAT);